/Engine/Source/Editor/MovieSceneTools/Public/Constraints/MovieSceneConstraintChannelHelper.h
Delete transform keys at that time
template<typename ChannelType> static void DeleteTransformKeys ( const [TArrayView](API\Runtime\Core\Containers\TArrayView)< ChannelType * > & InChannels, const [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) & InTime )